<!doctype html>
<html lang="zh-cn">
<head>
  <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
  <meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>IE图标</title>
</head>
<style>
  .IE {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 200px;
    height: 200px;
    transform: translate(-50%, -50%);
    border-radius: 50%;
    background-image: radial-gradient(#fff 38%, transparent 38%), radial-gradient(#09c 0%, #09c 100%);
  }
  .IE:before {
    content: "";
    width: 285px;
    height: 122px;
    background: none;
    border-radius: 100%;
    position: absolute;
    top: 33px;
    left: -45px;
    margin: auto;
    box-shadow: inset 0 12px 0 13px #09c, -35px -8px 0 -5px #fff;
    transform: rotate(-35deg);
  }
  .IE:after {
    content: "";
    width: 120px;
    height: 25px;
    background: #09c;
    position: absolute;
    top: 80px;
    left: 0;
    right: 0;
    margin: auto;
    box-shadow: 50px 23px 0 -2px #fff;
  }
</style>
<body>
<ul>
  <li>关键在于类似星环的外围一圈使用了内阴影实现</li>
</ul>
<div class="IE"></div>
</body>
</html>
